S-8077A525 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Enhanced durability and wear resistance from the Black Oxide finish, providing added protection against rust and reducing maintenance needs.
• Precise alignment and secure component mounting enabled by the 3/4" shoulder diameter and 4" shoulder length with tight tolerances.
• High-strength performance with a tensile strength of 70,000 psi and shear strength of 35,000 psi for demanding mechanical applications.
• Reliable, vibration-resistant assembly thanks to the Class 3A thread fit and coarse UNC thread pattern for secure fastening.
• Easy installation and removal using a standard 3/8" hex drive and knurled socket head for improved grip and torque application.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in industrial applications where precision, strength, and corrosion resistance are paramount. The 316 Stainless Steel material provides excellent resistance to chemicals and moisture, making it suitable for machinery, automotive, and marine environments. The Black Oxide finish enhances surface durability, reducing friction and wear during operation. With a Class 3A thread fit and coarse UNC thread type, it ensures tight, reliable connections that resist loosening under vibration. The socket head with knurled texture allows for easy handling and secure torque application, streamlining assembly in tight spaces. This screw is ideal for precision shoulder screw uses in pivots, axles, and rotating assemblies, offering long-term reliability and reduced downtime.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threads for precise engagement, and tolerances include shoulder diameter of -0.004" to -0.002" and shoulder length of -0.005" to 0.005". It complies with ASME B18.3 specifications for dimensional accuracy and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.